New research from Wake Forest Baptist Medical Center shows that patients suffering from aggressive brain tumors can be effectively treated with smaller radiation fields to spare the rest of the brain and preserve cognition. "For patients with glioblastoma, we now know we can safely and effectively treat them with smaller radiation fields to spare the rest of their normal brain," said lead investigator Michael D. Chan, M.D., assistant professor of radiation oncology at Wake Forest Baptist. "That's important because it lessens the symptoms from radiation toxicity like tiredness and nausea."